10 commands turn an Ubuntu VPS from soft target into fortress — here are the only ones that matter

A freshly provisioned Ubuntu VPS on Hetzner, OVH, or DigitalOcean receives its first SSH brute-force attempt within 12 minutes. These 10 commands — AppArmor, firewalld, fail2ban, auditd, AIDE, kernel hardening, Lynis, and unattended-upgrades — lock it down in 5 minutes flat.